ERROR: Loading of original wasm failed

[virgil2019]

When building ink! example flipper, I encountered the problem:

ERROR: Loading of original wasm failed

Caused by:
    0: Loading of wasm module at '/home/george/test/test/ink/flip40/target/ink/wasm32-unknown-unknown/release/flip40.wasm' failed
    1: Unknown opcode 192

[Environment]
Ubuntu 20.04, Ubuntu 20.04 WSL
cargo-contract-contract 3.0.1-unknown-x86_64-unknown-linux-gnu
SDK: 4.2.0
rust: stable-x86_64-unknown-linux-gnu (default)
rustc 1.70.0 (90c541806 2023-05-31)

I also tried with docker, but the issue is still there

[ascjones]

You will need to use Rust 1.69, there are new wasm opcodes emitted now in 1.70 that are not yet supported by cargo-contract and pallet-contracts.

Closing as duplicate of #1139